Repeating alarm-clock.



No. 881,555. PATENTED MAR. 10, 1908. W. D. DAVIES. REPBATING ALARMCLOCK.

APPLICATION FILED OUT. 30, 1907.

W726 unfegsm Q 17209726217 THE NGRRIS PETERS cm. WA HIMRYnn UNITED srArs PATENT OFFICE,

WALTER D. DAVIES; OF NEW YORK, N. Y., ASSIGNOR TO THE ANSONIA CLOCKCOMPANY,

REPEATING ALARM-CLOCK.

Specification of Letters Patent.

Patented March 10, 1908.

Application filed October 30, 1907. Serial No. 399,894.

Be it known that I, WALTER D. DAVIES, a

. citizen of the United States, and resident of the borough of Brooklyn,in the city and State of New York, have invented a new and usefulImprovement in Repeating Alarm Clocks,of which the following is aspecification.

My invention relates to a clock movement, the object being to providesimple and effective means in connection with the repeating alarm forleaving the time movement free from any interference from the repeatingalarm mechanism when the latter is not in actual operation.

A practical embodiment of my invention is re presented in theaccompanying drawings in which Figure 1 is a view of a clock movementin. front elevation; Fig. 2 is a side view of the same, Fig. 3 is avertical section in the plane of the line AA of Fig. 2, Fig. 4 is apartial horizontal section in detail showing the parts which form thesubject-matter of my present invention in their relation to the alarmtrip spring, and Fig. 5 is a section in the plane of the line BB of Fig4.

The several parts of the clock movement and the alarm in its relationthereto, may be of well known or approved construction, the generalarrangement here shown being a well known arrangement in which the stemof the alarm hammer is denoted by 1, the escapement wheel for operatingit, by 2, the springactuated spur wheel for operating the es capementmechanism by 3, the alarm trip spring by 4, the wheel driven by the timemechanism for permitting the trip spring to disengage the stem 1 of thealarm hammer by 5, and the second time wheel by 6.

On the spindle 7 of the second time wheel 6, there is a lantern pinion 8which engages a toe 9 on a swinging lever 10 fulcrumed at 11 on a studset in the front frame, the said lever being provided with a lateralprojection 12 at its end, in the present instance the lever itself isbent at its end to form the offset 12,

.the said offset being located in position to 1'0 ck into and out of thepath of the lower end of the stem 1 of the hammer to permit the latterto vibrate or prevent it from vibrating. The

lever 10 is further provided with an inclined bearing, in the presentinstance a bent or curved arm 13 extending laterally therefrom andprojecting through the front frame 14 of the movement into position toengage the on derside of the trip spring 4. In the present instance thearm 3 curves upwardly and outwardly and it may be conveniently formedintegral with the lever 10 by cutting the lever and arm in a singlepiece of sheet metal. The lever 10 is further provided on the oppositeside or toe side of its fulcrum, with an offset 15 for receiving thefree end of a light spring, in the present instance a wire spring 16,which may be coiled around the post 17 and extended, as clearly shown inFig. 3, from the post 17 to the offset 15, the tension of the springbeing exerted in a direction to normally depress the toe end of therocking lever 10.

The relative position of the trip spring 4 and the curved arm 13 on therocking lever 10 is such that when the trip spring 4 is pressed inwardlyinto position to engage the stem 1 of the alarm hammer, that is, intothe position which it occupies when the alarm is not in actualoperation, the said spring 1 will by its engagement with the top of thecurved arm 13, depress the end 12 of the rocking lever, lifting the toe9 wholly out of engagement with. the lantern pinion 8, thereby leavingthe time movement wholly free from. interference until the alarmactually operates.

hen during the rotary movement of the wheel 5 the trip spring 4 ispermitted to move outwardly and disengage the stem 1 of the alarm hammeras is common, it will at the same time swing over a depressed portion ofthe armJS on the lever 10, permitting the end 12 of said lever to riseand consequently the toe 9 at the opposite end of the lever to drop intoengagement with the lan tern pinion 8, the rise of the end 12 beingsuficient to catch the lower end of the stem 1 of the alarm hammer, thelever 10 thus for the time being, assuming control of the action of thealarm hammer.

As the lantern pinion 8 revolves with the second time wheel 6, the teethof the lantern pinion 8 by their engagement with the toe 9 of the lever,will automatically lift the toe end of the lever, thereby moving the end12 out of engagement with the end of the stem 1 of the alarm hammer andthe latter will be allowed to vibrate and ring the alarm until the toothof the lantern pinion 8 which lifted the toe end of the lever 10, hasdisengaged the toe 9 and permitted the said toe end of the lever toagain drop under the pressure of the spring 16, thereby throwing the end12 1 again into engagement with the stem 1 of the alarm hammer andarresting the action of the alarm.

In the present instance the lantern pinion S has six teeth at equaldistances apart thereon so that the alarm will operate for about tenseconds and then will be silent for about the same length of time andthis repetition will take place until the alarm driving spring has lostits driving force.

This simple mechanism above described is eminently efl'ective inoperation, and is, as hereinabove described, capable of being freed fromany interference with the time mechanism by the action of the alarm tripspring itself and is capable of being applied to ordinary clockmovements without re quiring any serious re-organization of themovement.

hat I claim is:

1. In a clock movement provided with an alarm mechanism, the combinationwith the ordinary alarm trip spring, of an alarm repeating mechanismarranged to be thrown out of engagement with the time mechanism when thesaid trip spring is in positionto arrest the alarm the said alarmrepeating mechanism including a rocking lever provided with an inclinedlaterally directed bearing in position to be engaged by the alarm tripspring.

2. In a clock movement provided with an alarm mechanism, the combinationwith the trip spring, of a rocking lever in position to engage the timemechanism to repeat the alarm, the said lever being provided with acurved bearing in position to engage the said trip spring and rock thelever out of engagement with the time mechanism when the trip springmoves into position to arrest the alarm.

3. In a clock movement provided with an alarm mechanism, the combinationwith a pinion on the second time wheel and the to be engaged by thealarm trip spring when the latter is moved in position to arrest thealarm.

4. In a clock movement provided with an alarm mechanism, the combinationwith the alarm trip spring and a pinion on the second time wheelspindle, of an alarm repeating lever iulcrumed intermediate of the saidpinion and the stem of the alarm hammer and provided with a toe inposition to engage the pinion and with a projection in position toengage the stem, the said lever being further provided with a curvedbearing extending laterally therefrom for engaging the trip spring asthe latter is moved laterally to arrest the alarm for lifting the toe ofsaid lever out of engagement with the pinion when the alarm is not inoperation.

5. In a time movement provided with an alarm mechanism, the combinationwith the trip spring and a pinion on the spindle of the second timewheel, of an alarm repeating lever interposed between the said pinionand the stem of the alarm hammer, the said lever being provided with atoe at one end for engaging the pinion and with a projection at theopposite end for engaging the stem of the alarm hammer, and a spring forholding the toe end of the lever depressed, the said lever beingprovided with a bearing for placing the said repeating lever under thecontrol of the trip spring.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two witnesses, this 25th day of October, 1907.

WALTER D. DAVIES.

Vitnesses:

Jos. Sonwnrznn, WALTER L. M. WATSON.

